Math Problem Statement
The horsepower (hp) that a shaft can safely transmit varies jointly with its speed (in revolutions per minute, rpm) and the cube of its diameter. If a shaft of a certain material 2 inches in diameter can transmit 36 hp at 75 rpm, what diameter must the shaft have in order to transmit 38 hp at 80 rpm?
Solution
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Math Problem Analysis
Mathematical Concepts
Joint Variation
Algebra
Formulas
hp = k * N * d^3
Theorems
Joint Variation Theorem
Suitable Grade Level
Grades 10-12
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